Compact Scientific Calculator 36

The Compact Scientific Calculator 36 application follows classical approach when uncertainty of f(x) calculation is estimated by formula max|(derivative(f))|*|x*uncertainty(x)|, where maximum of function derivative is considered on interval [x-uncertainty(x), x+uncertainty(x)].
Thus sin(2*pi)=0+-1E-54 and sin(2*1E20*pi)=0+-1E-34. As we see, the result’s accuracy degrades with growth of argument, but such approach allows to preserve all trigonometry facts like sin(even number*pi+x)=sin(x).Limitations in the unregistered version10 days trial
Nag screen